1922] Synopsis of Panurgidce 165 



2. Metathorax shining, inipunetate; tubercles yellow: head 



and mesonotum more sparsely punctured; veins darker; 

 Ip 7: 2; 6-7mm; oligolege of Helian these; Aug. 3 — Sept. 



28, labrosus. 



Metathorax opaque, punctate behind; tubercles dark; 

 head and mesonotum more closely and coarsely punctured; 

 veins paler; Ip 63^: 3; 5-6mm; oligolege of Hclianthese; 

 Aug. 15 — Sept. 25 labrosiformis. 



3. Hind tarsi not yellow; 6-7mm, 5. 



Hind tarsi yellow; mp shorter than galea 4. 



4. Scutel shining, almost impunctate; mesonotum not tri- 



sulcate; enclosure of labrum more narrowed apically; 

 wing clear hyaline; veins pale; scopa with long, long- 

 barbed hairs; Ip 8: 3; 6-7mm; oligolege of Helian these; 

 May 29 — Sept. 5, albitarsis. 



Scutel more opaque, closely punctured; mesonotum tri- 

 sulcate; enclosure of labrum less narrowed apically; 

 wing less hj^aline; scopa with short, short-barbed hairs; 

 Ip 7: 3; 5-7mm; oligolege of Asterese and Helianthea^; 

 Aug. 11 — Oct. 4, solidaginis. 



5. Mesonotum nearly bare; shining, rather finely and closely 



punctured; scopa rather short; mp about equaling galea; 

 Ip 4: 1; oligolege of Asterese and Helianthese; Aug. 23— 

 Oct. 23 asteris. 



Mesonotum distinctly pubescent, 6. 



6. Mesonotum entii-ely pubescent, opaque, with large shallow 



dense punctures; scopa rather short; mp about equaling 

 galea; Ip 4: 13^2; oligolege of Asterese; Sept. 6— Oct. 



29, compositarum. 



Mesonotum pubescent in front, shining, minutely and 

 sparsely punctured; scopa long and thin; mp a little 

 shorter than galea; Ip 43^:2; oligolege of Heliantheie; Aug. 

 1 — Sept. 12, rudbeckiae. 



